Angle nozzle



Jul? 30, 1957 l. M. RIDLEY I i 2,801,133

ANGLE NozzLE l Filed July 31, 1953 Auw M. R/DLEV, INVENToR.

United States Patent() f' l 2,801,133 ANGLE NOZZLE Ian M. Ridley, Los Angeles, Calif.,lassignor to Blastcrete- Equipment Co., Inc., Los AngelesCalir., a corporation of California Application July 31, 1953,:Sie1'ialv No. 371,438

1 Claim. (Cl. 299--107)' materials which may b e of an inherentlyabrasive char.

acter having-among tendency to weareout nozzlesof conventional construction.

The spraying of refractory materials, cementitious ma terials, and other aggregates such as Portland cement aggregate, has Ilong been practiced. Ordinarily straight nozzles have been employed-that is to say, nozzles having a continuous bore straight through the tting from the pipeline introducing the material to be sprayed to the ejector end.

There are, however, numerous occasions where, because of close quarters straight nozzles cannot be used, especially where, as in the handling of the material in question, the supply hose must be made of walls having such thickness that the hose cannot be bent in a sharp radius. Since there must be a reasonable distance between the nozzle tip and the surface upon which the material is to be sprayedthat is to say, a thickness exceeding twelve or fourteen inches-unless the nozzle can be removed further than this distance, the spray technique cannot be employed.

It is therefore among the objects of the invention to provide a new and improved spray nozzle for cementitious and refractory materials which is capable of sharply changing the direction of the material, thereby to make possible use of the nozzle in close quarters.

Another object of the invention is to provide a new and improved angular spray nozzle for semi-Huid materials with somewhat inherently abrasive characteristics so designed as to provide a pad of wear-resistant material at the location where the direction of ow is changed so that the material from which the nozzle is made will not wear out.

Still another object of the invention is to provide a new and improved nozzle for the spraying of semi-Huid cementitious materials having an abrasive character wherein the direction of flow is abruptly changed, the nozzle being so constructed that the abrasive material may be accumulated in a pocket which assumes, on its surface, the direction of flow where the direction of ow is changed so that a portion of the material normally passed through the nozzle may serve as a wear-resistant pad as long as the nozzle continues in use.

With these and other objects in view the invention consists in the construction, arrangement, and combination of the various parts of the device whereby the objects contemplated are attained as hereinafter set forth, pointed out in the appended claim, and illustrated in the accompanying drawings.

Figure l is a longitudinal sectional view of the nozzle in assembled condition showing the location of the abrasive resistant pad.

2,801,133 Patented July 30, 1957 Figure 2 is a longitudinal sectional exploded view of the'parts illustrated in Figure 1.

In the cementing of the interior of blast furnaces, tire boxes, pouring'ladles, and the like,'conventional nozzle equipment capable of sprayinga cementitious lining on the'walls thereofcan be used where there is sutiicieut room. On many occasions, however, Ythe iire box or other cavity may be of relatively small size, or more` particularly, located so close to some adjacent obstruction that a straight nozzle connected toa hose resistant to sharp bendscannot be worked into a proper position with respect to the walls upon which the materialsis to be sprayed. Since locations wherein such close quarters are found-comprise a very large percentage-of thelocations where the spray technique could otherwise be employed, it becomes highly desirable to provide an angle discharge nozzle which can avoid bending 'the supply.

hose. By providing a nozzle having the maximum change in direction of degrees, almost all installations, however close the quarters may be, can be treated by the spraying technique.

In the form of the `device chosen Vto illustrate theinvention, there is provided an ejector or angle nozzle consisting of an angle fitting 10 to which is connected a supply hose or inlet line 11. The fitting is provided with an inlet opening 12 within which the supply line is mounted and there secured, for example, by means of screws 13 having a length such that no portion of the metal of the screw is exposed to an inside bore 14 of the supply hose.

The longitudinal axis of the supply hose is herein indicated by the reference character 15. This is at right angles to a longitudinal axis 16 of an outlet opening 17 with which the fitting 10 is supplied.

A chamber 18 forms the interior of the fitting. More particularly, the chamber 18 is so formed that an extension of the chamber forms a pocket 19 in axial alignment with the supply hose and at the side of the chamber immediately opposite the inlet end of the supply hose.

On the tting extending around the outlet opening 17 is a threaded connection 20, to which is attached au outlet ow tting 21. The outlet flow litting has a straight passage 22 therethrough in axial alignment with the outlet opening 17. Internal threads 23 on one side engage the threaded connection 20. Internal threads 24 on the other side engage external threads 25 on a nozzle 26.

An annular space 27 within the outow fitting is adapted to contain and have centered therein a water ring 28. The water ring contains a series of circumferentially disposed water apertures 29 whereby water or other fluid may be supplied to the material prior to ejection from the nozzle. The water enters the space 27 through a passage 30 connected to a threaded water port 31, which in turn connects to a water line 32.

The nozzle 26 has a frusto-conical shape and is fitted with a frusto-conical lining 33. The lining is of preferably some soft material such as natural or synthetic rubber which is resistant to the wear experienced from passage therethrough of the abrasive, cementitious material. For securing the lining there is provided a bead 34 at the large end of the lining, which is pressed between the large threaded end of the nozzle and an adjacent face 35 of the water ring. A recess 36 is provided on the opposite side of the water ring which ts against a similarly shaped shoulder 37 at the interior of the outilow fitting so that the water ring may be anchored in proper position.

If desired, the pocket 19 may be initially lined with a somewhat sticky, mastic material 38 should the character of the semi-huid abrasive material normally passed through the nozzle be one Yresistant to normal accumulation in the pocket. It is found, however, that most of the materials with which the nozzle is used are such thaty after a few moments of operation duringyvhichthe cementitious material is blownlthroughv the`lnz"zle,ia quantity/ofV the same materialwill accumulate in the form of'a pad 39, astillustrated in Figure 1.` The jc'ontinuousv motion ofthe cementitious fmaterial passing'Y i through'the nozzleA gives the pad a sphericallycurved surface 40which becomes the natural linetofV flow of material through the nozzleafter any eddying effect is eliminatedV by Vthelaccumulation of material forming the pad; ,t

intothe tting so that the abrasivematerial passing It .will be ar'ipreciated.furtherv that should occasion requre,a'comp1ete'pad of material maybe initiallybilt- 15 through :theno'zzle' need not ,bedepended' upon to build 2,s"o1,133 .Y Y t Y i, e. a

resistant to wear, even when the direction of flow changes as much as 90 degrees with respect to the inow, the

fitting herein disclosed being one which greatly extends the eld of usefulness of nozzles adapted for this purpose.

I claim:

In an angular ejector for semi-fluid aggregate mixture, the improvement comprising an empty chamber in the form of an abrupt angle intermediate the Vinlet and outlet openings of the ejector, a pocket opposite the inlet opening to the chamber adapted to accumulate a pad of the aggregate of the mixture for protection of the `Wall of the chamber against wear, anda lining of mastic material on the inside surface of the pocket for accumulating the pad thereon.k v

References Cited in the le of this patent UNITED STATES PATENTS i Y Foster Y rune 25,1389vv 973,94()Y Jones Oct. 25, `1,910 1,848,122. Forster ;e- Mar. 8, 19732.v 2,577,664 Pro Dec. 4, 1951 2,594,735 

